@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Orbitron:wght@700;900&display=swap');

/* ============================================================
   CSS 变量 & 基础重置
   ============================================================ */
:root {
  --bg: #0d0d0d;
  --green: #00ff41;
  --magenta: #ff00ff;
  --green-dim: rgba(0,255,65,0.15);
  --magenta-dim: rgba(255,0,255,0.15);
  --green-mid: rgba(0,255,65,0.5);
  --magenta-mid: rgba(255,0,255,0.5);
  --surface: #111418;
  --surface2: #181c22;
  --border: rgba(0,255,65,0.25);
  --border-mag: rgba(255,0,255,0.3);
  --text: #d4f5e2;
  --text-dim: #7a9e8a;
  --font-display: 'Orbitron', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  --radius: 10px;
  --nav-h: 100px;
  --max-w: 960px;
  --max-w-wide: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.7;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: var(--green); text-decoration: none; }
a:hover { color: var(--magenta); }
ul, ol { list-style: none; }

/* ============================================================
   动效：Kinetic Typography
   ============================================================ */
@keyframes neon-flicker {
  0%,100% { opacity: 1; text-shadow: 0 0 8px var(--green), 0 0 20px var(--green); }
  50%      { opacity: .85; text-shadow: 0 0 4px var(--green); }
}

@keyframes magenta-pulse {
  0%,100% { text-shadow: 0 0 8px var(--magenta), 0 0 24px var(--magenta); }
  50%      { text-shadow: 0 0 3px var(--magenta); }
}

@keyframes type-cursor {
  0%,100% { border-right-color: var(--green); }
  50%      { border-right-color: transparent; }
}

@keyframes badge-float {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

@keyframes reveal-up {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scan-line {
  0%   { transform: translateY(-100%); }
  100% { transform: translateY(100vh); }
}

@keyframes matrix-drop {
  0%   { opacity: 1; transform: translateY(-100%); }
  100% { opacity: 0; transform: translateY(100%); }
}

@keyframes glitch-shift {
  0%,100% { clip-path: inset(0 0 100% 0); transform: none; }
  20%  { clip-path: inset(10% 0 60% 0); transform: translateX(-3px); }
  40%  { clip-path: inset(50% 0 20% 0); transform: translateX(3px); }
  60%  { clip-path: inset(70% 0 5%  0); transform: translateX(-2px); }
  80%  { clip-path: inset(30% 0 40% 0); transform: translateX(2px); }
}

/* ============================================================
   站点外壳
   ============================================================ */
.site-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ============================================================
   导航：顶部两行，品牌居中，菜单平铺
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,13,13,.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.header-brand-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 14px 24px 8px;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--green);
  letter-spacing: .12em;
  animation: neon-flicker 4s ease-in-out infinite;
}
.brand-name:hover { color: var(--magenta); }

.brand-glyph {
  color: var(--magenta);
  font-size: 1.1rem;
  opacity: .7;
}

.header-nav-row {
  border-top: 1px solid var(--green-dim);
  padding: 6px 24px 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.header-nav-row::-webkit-scrollbar { height: 2px; background: transparent; }
.header-nav-row::-webkit-scrollbar-thumb { background: var(--green-dim); }

.main-nav p {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 0;
}

.main-nav a {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--text-dim);
  padding: 8px 14px;
  letter-spacing: .05em;
  border-right: 1px solid var(--border);
  white-space: nowrap;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  transition: color .2s, background .2s;
}
.main-nav a:last-child { border-right: none; }
.main-nav a:hover {
  color: var(--green);
  background: var(--green-dim);
}

/* ============================================================
   Hero（首页）
   ============================================================ */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}
.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,13,13,.92) 0%, rgba(13,13,13,.6) 60%, rgba(255,0,255,.08) 100%);
}

.hero-body {
  position: relative;
  z-index: 2;
  max-width: var(--max-w-wide);
  width: 100%;
  margin: 0 auto;
  padding: 60px 40px 56px;
}

.hero-eyebrow {
  margin-bottom: 18px;
}

.typing-badge {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--green);
  background: var(--green-dim);
  border: 1px solid var(--green);
  padding: 4px 12px;
  letter-spacing: .08em;
  border-right: 3px solid var(--green);
  animation: type-cursor .7s step-end infinite;
}

.hero-h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: .04em;
  color: var(--green);
  animation: neon-flicker 5s ease-in-out infinite;
  margin-bottom: 16px;
  max-width: 14em;
}

.hero-sub {
  font-size: 1rem;
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 28px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.float-badge {
  font-family: var(--font-mono);
  font-size: .75rem;
  background: rgba(255,0,255,.12);
  border: 1px solid var(--magenta);
  color: var(--magenta);
  padding: 5px 14px;
  border-radius: 3px;
  animation: badge-float 3s ease-in-out infinite;
  letter-spacing: .06em;
}
.float-badge:nth-child(2) { animation-delay: .4s; }
.float-badge:nth-child(3) { animation-delay: .8s; }
.float-badge:nth-child(4) { animation-delay: 1.2s; }

/* ============================================================
   分类 Banner（category/about/privacy）
   ============================================================ */
.cat-banner, .about-banner, .privacy-banner {
  position: relative;
  padding: 56px 40px 48px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  background: linear-gradient(180deg, #0d0d16 0%, var(--bg) 100%);
}

.cat-banner::before, .about-banner::before, .privacy-banner::before {
  content: '';
  position: absolute;
  left: 0; top: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--magenta), var(--green));
}

.cat-banner-inner, .about-banner-inner, .privacy-banner-inner {
  max-width: var(--max-w-wide);
  margin: 0 auto;
}

.cat-eyebrow {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--magenta);
  letter-spacing: .15em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.cat-h1, .about-h1, .privacy-h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--green);
  letter-spacing: .06em;
  line-height: 1.2;
  margin-bottom: 10px;
}

.cat-desc, .privacy-sub {
  font-size: .95rem;
  color: var(--text-dim);
  max-width: 600px;
}

.matrix-rain-strip {
  position: absolute;
  right: 40px; top: 0; bottom: 0;
  width: 120px;
  overflow: hidden;
  opacity: .18;
  pointer-events: none;
}

/* ============================================================
   文章 Hero
   ============================================================ */
.art-hero-wrap {
  position: relative;
  height: 320px;
  overflow: hidden;
}
.art-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.art-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(13,13,13,.3) 0%, rgba(13,13,13,.9) 100%);
}

/* ============================================================
   主体布局
   ============================================================ */
.main-wrap {
  flex: 1;
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 48px 40px;
  width: 100%;
}

.content-article {
  width: 100%;
}

.content-outer {
  max-width: var(--max-w);
  margin: 0 auto;
}

.content-inner.page-content {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text);
}

.page-content h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--green);
  margin: 2em 0 .8em;
  letter-spacing: .05em;
  border-left: 3px solid var(--green);
  padding-left: 12px;
}
.page-content h3 {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--magenta);
  margin: 1.6em 0 .6em;
}
.page-content p { margin-bottom: 1.2em; }
.page-content a { color: var(--green); border-bottom: 1px solid var(--green-dim); }
.page-content a:hover { color: var(--magenta); border-bottom-color: var(--magenta-mid); }
.page-content ul, .page-content ol {
  padding-left: 1.4em;
  margin-bottom: 1.2em;
}
.page-content li { margin-bottom: .4em; list-style: disc; }
.page-content blockquote {
  border-left: 3px solid var(--magenta);
  padding: 12px 20px;
  background: var(--magenta-dim);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.4em 0;
  color: var(--text-dim);
}
.page-content code {
  font-family: var(--font-mono);
  font-size: .88em;
  background: rgba(0,255,65,.1);
  color: var(--green);
  padding: 2px 6px;
  border-radius: 3px;
}

/* ============================================================
   文章元信息
   ============================================================ */
.art-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.breadcrumb-link {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--text-dim);
  padding: 6px 0;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.breadcrumb-link:hover { color: var(--green); }

.art-dates {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.art-pub-date, .art-mod-date {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-dim);
  letter-spacing: .04em;
}
.art-pub-date { color: var(--green); }

.art-headline {
  margin-bottom: 32px;
}
.art-h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.6rem);
  font-weight: 900;
  color: var(--green);
  letter-spacing: .04em;
  line-height: 1.15;
  margin-bottom: 10px;
  animation: neon-flicker 6s ease-in-out infinite;
}
.art-desc {
  font-size: .95rem;
  color: var(--text-dim);
}

/* ============================================================
   关于页
   ============================================================ */
.about-intro {
  margin-bottom: 32px;
  padding: 24px;
  background: var(--green-dim);
  border-left: 3px solid var(--green);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.about-lead {
  font-size: 1.1rem;
  color: var(--text);
  line-height: 1.8;
}

.about-nav-block, .privacy-nav-block {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.about-nav-label {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-dim);
  letter-spacing: .1em;
  margin-bottom: 10px;
}

/* ============================================================
   Section 标题
   ============================================================ */
.section-heading {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .08em;
  margin-bottom: 24px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.hl-green { color: var(--green); }
.hl-magenta { color: var(--magenta); }

/* ============================================================
   卡片栅格（card-grid）
   ============================================================ */
.home-cats, .home-articles, .related-section {
  margin-top: 56px;
  max-width: var(--max-w-wide);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.card-grid li a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px 14px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color .25s, background .25s;
  position: relative;
  overflow: hidden;
  min-height: 40px;
}
.card-grid li a:hover {
  border-color: var(--green);
  background: var(--surface2);
}

.card-title {
  font-family: var(--font-mono);
  font-size: .9rem;
  color: var(--text);
  line-height: 1.4;
}
.card-desc {
  font-size: .78rem;
  color: var(--text-dim);
  line-height: 1.5;
}
.card-line {
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--magenta));
  border-radius: 1px;
  margin-top: auto;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.card-grid li a:hover .card-line { transform: scaleX(1); }

.badge-num {
  font-family: var(--font-mono);
  font-size: .65rem;
  color: var(--magenta);
  border: 1px solid var(--magenta);
  padding: 1px 6px;
  border-radius: 3px;
  align-self: flex-start;
  letter-spacing: .06em;
}

.art-date {
  font-size: .72rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* ============================================================
   子页列表（category）
   ============================================================ */
.child-list-section {
  margin-top: 48px;
}

.child-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.child-item a {
  display: grid;
  grid-template-columns: 3rem 1fr;
  grid-template-rows: auto auto;
  gap: 2px 12px;
  padding: 16px 12px;
  border-bottom: 1px solid var(--border);
  transition: background .2s;
  min-height: 56px;
  align-items: center;
}
.child-item a:hover { background: var(--green-dim); }

.child-idx {
  grid-row: 1 / 3;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--magenta);
  align-self: center;
  letter-spacing: -.02em;
}

.child-title {
  font-family: var(--font-mono);
  font-size: .92rem;
  color: var(--text);
  line-height: 1.4;
}

.child-item small {
  font-size: .75rem;
  color: var(--text-dim);
  line-height: 1.4;
  display: block;
}
.child-item time {
  margin-left: 8px;
  color: var(--green);
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  margin-top: auto;
}

.footer-cols {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 40px 40px 24px;
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: .75rem;
  color: var(--green);
  letter-spacing: .12em;
  margin-bottom: 10px;
}

.footer-col p {
  font-size: .8rem;
  color: var(--text-dim);
  line-height: 1.7;
}

.footer-col--center { text-align: center; }
.footer-col--right  { text-align: right; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 2px;
}
.footer-col--center .footer-links { justify-content: center; }
.footer-col--right  .footer-links { justify-content: flex-end; }

.footer-links a {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--text-dim);
  padding: 6px 10px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border: 1px solid transparent;
  border-radius: 4px;
  transition: color .2s, border-color .2s;
}
.footer-links a:hover {
  color: var(--green);
  border-color: var(--green-dim);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 16px 40px;
  text-align: center;
}
.footer-bottom p {
  font-size: .75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}
.footer-bottom a { color: var(--text-dim); }
.footer-bottom a:hover { color: var(--green); }

/* ============================================================
   Kinetic 动效通用类
   ============================================================ */
.kinetic-text {
  position: relative;
}
.kinetic-text::after {
  content: '';
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  background: inherit;
  pointer-events: none;
}

/* reveal on scroll */
.reveal-section {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-item {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s ease, transform .5s ease;
}
.reveal-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* scan line overlay */
.site-shell::before {
  content: '';
  position: fixed;
  left: 0; top: -100vh; right: 0;
  height: 200vh;
  background: linear-gradient(transparent 50%, rgba(0,255,65,.02) 50%);
  background-size: 100% 4px;
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   隐私页特定
   ============================================================ */
.privacy-content h2 { margin-top: 1.8em; }

/* ============================================================
   响应式断点
   ============================================================ */
@media (max-width: 900px) {
  .footer-cols {
    grid-template-columns: 1fr 1fr;
    padding: 32px 24px 20px;
  }
  .footer-col--right { text-align: left; }
  .footer-col--right .footer-links { justify-content: flex-start; }
}

@media (max-width: 640px) {
  .header-brand-row { padding: 12px 16px 6px; }
  .brand-name { font-size: 1.1rem; }
  .header-nav-row { padding: 4px 8px 8px; }
  .main-nav a { font-size: .72rem; padding: 8px 10px; }

  .hero { min-height: 70vh; }
  .hero-body { padding: 40px 20px 40px; }
  .hero-h1 { font-size: clamp(1.7rem, 8vw, 2.6rem); }

  .cat-banner, .about-banner, .privacy-banner {
    padding: 40px 20px 32px;
  }

  .main-wrap { padding: 32px 20px; }

  .card-grid { grid-template-columns: 1fr 1fr; gap: 12px; }

  .footer-cols {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px 20px 16px;
  }
  .footer-col--center, .footer-col--right { text-align: left; }
  .footer-col--center .footer-links,
  .footer-col--right  .footer-links { justify-content: flex-start; }
  .footer-bottom { padding: 14px 20px; }

  .art-meta-bar { flex-direction: column; align-items: flex-start; }
  .child-item a { grid-template-columns: 2.4rem 1fr; }

  .matrix-rain-strip { display: none; }
}

@media (max-width: 375px) {
  .card-grid { grid-template-columns: 1fr; }
  .hero-h1 { font-size: 1.6rem; }
  .hero-badges { gap: 8px; }
}

/* ============================================================
   prefers-reduced-motion：关闭所有动效
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal-section,
  .reveal-item {
    opacity: 1;
    transform: none;
  }
}